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Tatsuyuki reported on update of Hbb coupling measurement using BDT.
He added Mjj,higgs to the training input variables, and optimized BDT parameters.
Sigma(g)/g became better, 0.0067 (from 0.0071).
After the meeting, according to the suggestion from Uta, he added preselection Mjj,higgs>70 GeV, and Sigma(g)/g became 0.0068.
Kechen presented the results for the singly charged Higgs searches at the LHeC and FCC-eh.
The details about the model motivation, search strategy and data analysis was discussed.
Very helpful comments on the additional SM backgrounds, and the comparison and complementary between ep and pp colliders are given.
Orhan presented an update on top FCNC studies at LHeC and FCC-eh. Expected limits on branching ratios BR(t->u gamma) and BR(t->c gamma) for different integrated luminosity projections have been discussed and the results are compared with the HL-LHC expected results. In order to estimate possible effects from tqZ couplings, when the equal couplings scenario (lambda_q=kappa_q) is assumed it is shown that LHeC can probe FCNC couplings down to lambda_q=0.007 and 0.005 for integrated luminosity of 500 fb^(-1) and 1 ab^(-1), respectively. His team continue to test delphes_card for different final states.
Georges explored different possibilities of testing anomalous quartic couplings.
One could test many operators, in many different channels of vector boson scattering. By just looking at the effects on the cross section, and without doing a detailed background analysis, it seems that the effect is small in most cases, but the channel W+W- could have high sensitivity to the LT operators. In general, it can be said that, for such a non-resonant signal where the background must be well understood, the advantage over LHC is that there is little or no QCD background, but the problem is that the cm energy required is high.